US Stocks Close Higher as Tech Leads; Nasdaq Hits Record

On Wednesday, the US stock market saw a broad rally, with all three major indices closing higher. The Nasdaq Composite once again set a new record closing high, while the S&P 500 approached its previous peak. Market risk appetite clearly improved, with heavyweight tech stocks serving as the core engine of this upward move, as investor optimism regarding artificial intelligence and the semiconductor supply chain continued to build.

Nasdaq Leads, S&P Follows

During the trading session, the Nasdaq showed the strongest performance, closing with a significantly larger gain than the Dow Jones Industrial Average. The S&P 500 also posted a solid advance, with most of its 11 major sectors finishing in positive territory, led by consumer discretionary and information technology. The Dow rose more modestly, but the overall market displayed a broad advance, with small-cap stocks also performing well, indicating high participation from investors.

Tech Heavyweights: The Dual Engine of NVDA and AAPL

As bellwethers of this rally, Nvidia (NVDA) and Apple (AAPL) had a particularly notable impact on the Nasdaq. Nvidia continued its recent strength, with high expectations for its next-generation AI chips and sustained growth in data center demand. Apple, despite its overall growth stabilizing, still offers investors room for imagination through its AI terminal applications and services segment. The combined market-cap weight of these two companies in the Nasdaq is substantial, and their steady share price gains directly lifted the index.

Additionally, other large-cap tech stocks such as Microsoft and Alphabet (Google's parent) also rose, further cementing the tech sector's leadership. Market observers noted that fund flows indicate institutional investors are still increasing their positions in large-cap tech, particularly those with clear monetization paths in AI infrastructure and applications.

Market Sentiment and Macro Backdrop

The rally took place against a backdrop of stabilizing expectations for the Federal Reserve's monetary policy path. Although some recent economic data remain resilient, inflation pressures are broadly under control, and investors generally expect the Fed to keep rates unchanged or make only minor adjustments for the rest of the year. This expectation has reduced concerns about liquidity tightening and provided support for growth stock valuations.

Meanwhile, the earnings season is drawing to a close, with most tech companies that have reported beating expectations, especially in the cloud services and chip sectors. According to public earnings reports, several company managements emphasized strong demand for AI-related orders during conference calls, further reinforcing confidence in the sustainability of tech sector profitability.

Outlook: Watch Valuations and Breadth

Despite the Nasdaq's new high, there remains some divergence within the market. Some analysts point out that the index's rise is highly concentrated, with a few heavyweight stocks contributing most of the gains, while small- and mid-cap tech stocks have lagged in their follow-through. This structural divergence may indicate that the market's preference for high-certainty assets persists, but it also warrants caution: if these heavyweight stocks pull back, the index could face significant volatility.

From a technical perspective, both the Nasdaq and the S&P 500 are in upward channels, with short-term moving averages in a bullish alignment. However, as indices continue to climb, technical overbought signals are gradually emerging, and a period of consolidation or pullback could occur in the near term. Investors will be closely watching upcoming economic data and Fed officials' speeches for further policy clues.

Overall, the US stock market remains strong, led by tech stocks, with the AI industry trend as the core narrative. However, issues of insufficient market breadth and elevated valuations cannot be ignored. Whether the rally can continue will depend on whether earnings growth can justify current valuation levels.